What Database Concept States That the Primary Key Cannot Allow

question 37

Multiple Choice

What database concept states that the primary key cannot allow null values?

• A)legal-values integrity
• B)structural integrity
• C)referential integrity
• D)entity integrity

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Definitions:

NaOH

Sodium hydroxide, a strong base used in various industrial and chemical processes, including soap making and pH adjustment.

Solution

A uniform mixture of two or more substances where one substance is dissolved in another.

Solution

A homogeneous mixture of two or more substances where the solute is dissolved in the solvent.

Neutral Solution

A solution that has a pH of 7, indicating no acidic or alkaline qualities.